<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>bst debugger</title>
</head>
<body>
    <div style="position: relative;">
        <canvas id="background-canvas" width="800px" height="600px" style="position: absolute; left: 0; top: 0; z-index: 0;"></canvas>
        <canvas id="forground-canvas" width="800px" height="600px" style="position: absolute; left: 0; top: 0; z-index: 1;"></canvas>
    </div>
    <script type="module" src="convex.ts"></script>
</body>
</html>